To get the Crown, in the Demon Guest House, there is a small room with a bed, a waiter skeleton, and a chair in it. When you enter the skeleton will throw curry at you and run into then kill itself by running into the wall. Walk in front of the chair and press Up to sit in it. Wait approximately fifteen seconds and a crown will appear on the floor. It cannot be equipped and you cannot use it. The description reads "5000 points".